NCP1337

更新时间： 2024-11-30 04:37:59

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
14页	138K
描述
PWM Current−Mode Controller for Free Running Quasi−Resonant Operation

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NCP1337 数据手册

NCP1337

PWM Current−Mode

Controller for Free Running

Quasi−Resonant Operation

The NCP1337 combines a true current mode modulator and a

demagnetization detector which ensures full Borderline/Critical

Conduction Mode in any load/line conditions together with

minimum drain voltage switching (Quasi−Resonant operation). The

transformer core reset detection is done internally, without using any

external signal, due to the Soxyless concept. The frequency is

internally limited to 130 kHz, preventing the controller to operate

above the 150 kHz CISPR−22 EMI starting limit.

http://onsemi.com

MARKING

DIAGRAM

By monitoring the feedback pin activity, the controller enters

ripple mode as soon as the power demand falls below a

predetermined level. As each restart is softened by an internal

soft−start, and as the frequency cannot go below 25 kHz, no audible

noise can be heard.

The NCP1337 also features an efficient protective circuitry which,

in presence of an overcurrent condition, disables the output pulses

and enters a safe burst mode, trying to restart. Once the default has

gone, the device auto−recovers. Also included is a bulk voltage

monitoring function (known as brown−out protection), an adjustable

NCP1337P

AWL

YYWWG

PDIP−7

P SUFFIX

CASE 626B

P1337

AYWW

SOIC−7

D SUFFIX

CASE 751U

overpower compensation, and a V OVP. Finally, an internal 4.0 ms

soft−start eliminates the traditional startup stress.

= Assembly Location

= Wafer Lot

Features

Y, YY = Year

• Free−Running Borderline/Critical Mode Quasi−Resonant Operation

• Current−Mode

= Work Week

= Pb−Free Package

• Soft Ripple Mode with Minimum Switching Frequency for Standby

• Auto−Recovery Short−Circuit Protection Independent of Auxiliary

Voltage

PIN CONNECTIONS

• Overvoltage Protection

• Brown−Out Protection

• Two Externally Triggerable Fault Comparators (one for a disable

function, and the other for a permanent latch)

• Internal 4.0 ms Soft−Start

VCC

DRV

GND

• 500 mA Peak Current Drive Sink Capability

• 130 kHz Max Frequency

(Top View)

• Internal Leading Edge Blanking

• Internal Temperature Shutdown

ORDERING INFORMATION

• Direct Optocoupler Connection

Device

Package

Shipping†

• Dynamic Self−Supply with Levels of 12 V (On) and 10 V (Off)

• SPICE Models Available for TRANsient and AC Analysis

• These are Pb−Free Devices*

NCP1337PG

PDIP−7

(Pb−Free)

50 Units/Tube

NCP1337DR2G

SOIC−7

(Pb−Free)

2500 Tape & Reel

Typical Applications

• AC−DC Adapters for Notebooks, etc.

• Offline Battery Chargers

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

• Consumer Electronics (DVD Players, Set−Top Boxes, TVs, etc.)

• Auxiliary Power Supplies (USB, Appliances, TVs, etc.)

*For additional information on our Pb−Free strategy

and soldering details, please download the

ON Semiconductor Soldering and Mounting

Techniques Reference Manual, SOLDERRM/D.

Semiconductor Components Industries, LLC, 2006

Publication Order Number:

July, 2006 − Rev. 2

NCP1337/D

12 3 4 5 6 7...14

中文翻译

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与NCP1337相关器件

型号	品牌	获取价格	描述	数据表
NCP1337_11	ONSEMI	获取价格	PWM Current-Mode Controller for Free Running Quasi-Resonant Operation
NCP1337DR2G	ONSEMI	获取价格	PWM Current−Mode Controller for Free Running Quasi−Resonant Operation
NCP1337PG	ONSEMI	获取价格	PWM Current−Mode Controller for Free Running Quasi−Resonant Operation
NCP1338	ONSEMI	获取价格	PWM Current-Mode Controller for Free Running Quasi-Resonant Operation
NCP1338DR2G	ONSEMI	获取价格	PWM Current-Mode Controller for Free Running Quasi-Resonant Operation
NCP1338PG	ONSEMI	获取价格	PWM Current-Mode Controller for Free Running Quasi-Resonant Operation
NCP1339	ONSEMI	获取价格	High-Voltage, Quasi-Resonant Controller featuring Valley Lock-Out
NCP1339_16	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
NCP1339CDR2G	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode
NCP1339DDR2G	ONSEMI	获取价格	High-Voltage, QuasiResonant Controller featuring Valley Lock-Out and Power Saving Mode

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